wellll, maybe needed if you're running an ASR-33 teletype. . . Don Mike S > On 1/27/2014 1:33 PM, Robert Atkinson wrote: >> I looked at this a while ago. The "spec" only defines transmission >> levels, it does NOT specify receive thresholds. > > It certainly does... > > "2.1.3 For data interchange circuits, the signal shall be considered in > the marking condition when the voltage on the interchange circuit, > measured at the interface point, is more negative than -3 volts with > respect to Circuit AB (Signal Common). The signal shall be considered in > the spacing condition when the voltage is more positive than +3 volts > with respect to Circuit AB (see 6.2). The region between +- 3 volts is > defined as the transition region. The signal state is undefined when the > voltage is in this transition region." > > - ANSI TIA/EIA-232-F (1997) > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > >
-- "The power of accurate observation is commonly called cynicism by those who have not got it." -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.